Java Bit Set setBit(byte data, int pos, int val)

Description

Set one bit in a byte at the specified position with the specified bit value.

License

Open Source License

Parameter

Parameter	Description
data	the Byte to study
pos	the bit position to get [0-7] (zero to seven)
val	the value to set (zero or one)

Return

the converted data byte (copy of)

Declaration

public static byte setBit(byte data, int pos, int val) 

Method Source Code

//package com.java2s;
/*//from  ww  w  .java 2s.com
 * Copyright (C) 2014 Jesse Caulfield 
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

public class Main {
    /**
     * Set one bit in a byte at the specified position with the specified bit
     * value. The original data byte is not touched. It is copied, and a new byte
     * with the bit set is returned.
     *
     * @param data the Byte to study
     * @param pos  the bit position to get [0-7] (zero to seven)
     * @param val  the value to set (zero or one)
     * @return the converted data byte (copy of)
     */
    public static byte setBit(byte data, int pos, int val) {
        int posBit = pos % 8;
        return (byte) ((val << (8 - (posBit + 1))) | data);
    }

    /**
     * Set one bit to a bit string at the specified position with the specified
     * bit value.
     *
     * @param data the Byte to study
     * @param pos  the bit position to get [0-7] (zero to seven)
     * @param val  the value to set (zero or one)
     */
    public static void setBit(byte[] data, int pos, int val) {
        int posByte = pos / 8;
        int posBit = pos % 8;
        byte oldByte = data[posByte];
        oldByte = (byte) (((0xFF7F >> posBit) & oldByte) & 0x00FF);
        byte newByte = (byte) ((val << (8 - (posBit + 1))) | oldByte);
        data[posByte] = newByte;
    }
}

Related

1. setBit(byte b, int i)
2. setBit(byte b, int pos)
3. setBit(byte data, byte bit, boolean value)
4. setBit(byte data, int bitNumber, boolean value)
5. setBit(byte data, int bitPos, boolean on)
6. setBit(byte in, int position, boolean value)
7. setBit(byte input, int bit)
8. setBit(byte original, int bitToSet)
9. setBit(byte target, byte pos)